243200855 has 16 divisors (see below), whose sum is σ = 308037600. Its totient is φ = 183818880.

The previous prime is 243200851. The next prime is 243200857. The reversal of 243200855 is 558002342.

It is not a de Polignac number, because 243200855 - 2² = 243200851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243200851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33665 + ... + 40245.

It is an arithmetic number, because the mean of its divisors is an integer number (19252350).

Almost surely, 2^243200855 is an apocalyptic number.

243200855 is a deficient number, since it is larger than the sum of its proper divisors (64836745).

243200855 is a wasteful number, since it uses less digits than its factorization.

243200855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 243200855 is about 15594.8983645293. The cubic root of 243200855 is about 624.1970317623.

The spelling of 243200855 in words is "two hundred forty-three million, two hundred thousand, eight hundred fifty-five".